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Balance Sheet Components (Tables) | 12 Months Ended
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Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Property and Equipment, Net | All property and equipment is depreciated on a straight-line basis over the estimated useful lives of the assets, which are as follows:
Computer and office equipment | 3 – 5 years
Machinery and equipment | 3 – 5 years
Furniture and fixtures | 7 years
Property and Equipment, net (in thousands):
| December 31, |  | December 31,
| 2018 |  | 2017
Machinery and equipment | $ | 3,785 |  |  | $ | 3,428 |
Construction in progress | 730 |  |  | 879 |
Computer and office equipment | 407 |  |  | 310 |
Leasehold improvements | 448 |  |  | 272 |
Furniture and fixtures | 148 |  |  | 29 |
| 5,518 |  |  | 4,918 |
Less: Accumulated depreciation and amortization | (3,364 | ) |  | (3,022 | )
| $ | 2,154 |  |  | $ | 1,896 |
Schedule of Accrued Liabilities and Other | Accrued Liabilities and Other (in thousands):
| December 31, |  | December 31,
| 2018 |  | 2017
Accrued compensation and related expenses | $ | 5,425 |  |  | $ | 3,732 |
Accrued interest | — |  |  | 831 |
Accrued professional services | 583 |  |  | 341 |
Sales tax payable | 388 |  |  | 466 |
Liability for early exercise of unvested stock options | 331 |  |  | 65 |
Sales and warranty reserves | 35 |  |  | 149 |
Other | 98 |  |  | 140 |
| $ | 6,860 |  |  | $ | 5,724 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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